Automated liquid-solid extraction of pyrene from soil on centrifugal microfluidic devices
| Autor: | David A. Duford, Yongqing Xi, Eric D. Salin |
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| Rok vydání: | 2010 |
| Předmět: |
Detection limit
Analyte Chromatography Pyrenes Environmental analysis Extraction (chemistry) Analytical chemistry Centrifugation Microfluidic Analytical Techniques Analytical Chemistry law.invention chemistry.chemical_compound Automation chemistry law Pyrene Soil Pollutants Sample preparation Solid phase extraction Filtration Solid Phase Microextraction Environmental Monitoring |
| Zdroj: | Talanta. 82(3) |
| ISSN: | 1873-3573 |
| Popis: | Organic pollutants such as polycyclic aromatic hydrocarbons (PAHs) are present in the environment in increasing concentrations and so are of growing concern. Monitoring these species, particularly on-site, can be both difficult and expensive. This paper presents a novel miniaturised magnetically actuated liquid–solid extraction unit integrated in tandem with a filtration unit and a detection unit on a single centrifugal microfluidic device. A demonstration analyte, pyrene, was rapidly extracted and quantified by UV-absorbance from multiple soil samples. The system showed excellent performance for a system designed for field use. Characterization of two types of passive valves was performed along with an extraction time efficiency study. The system provides a factor of 150 reduction in sample weights and extraction solvent volumes and provides statistically similar recoveries to the conventional method with a pyrene detection limit of 1 ppm (0.03 μg absolute detection limit). The reduction in time and solvent and the potential for field use suggest that this device type may be valuable for environmental monitoring. |
| Databáze: | OpenAIRE |
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